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This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

block_mimo
----------

This block simulates the channel interface between two transmitting
antennas with two receivers. This block also adds noise.
The block implements the following,
 y = Hx + n

where,
 'y = [y1 y2]' ' is the received vector or the output of this module.

 'H = [a11 a12;
       a21 a22]  is the channel matrix.

 'x = [x1 x2]' ' is the transmit vector or the input of this module.

 'n = [n1 n2]' ' is the AWGN. n1,n2 are independent.

Inputs:
	SAMPLE_S12[2]

outputs:
	SAMPLE_S12[2]

Config:
	a[2][2]<double>: [ 1 .25 ; .25 1 ]
		Channel Transmission Coefficients

	noise_amplitude<int>: 0
		amplitude of the white noise

	sigma<double>: 100
		variance of the gaussian noise

	size<int>: 2560 * 4
		The size in samples